NZQA registered unit standard
23105 version 2
Page 1 of 6
Title
Develop profile, and grind and hone profile cutters in-head
Level
4
Credits
25
Purpose
People credited with this unit standard are able to: determine
developed profile shape; manage hazards associated with
grinding and honing profile cutters in-head; clean cutterhead;
prepare grinder; mount and adjust cutterhead and template;
grind and hone cutters; and store cutterhead.
Classification
Solid Wood Manufacturing > Timber Machining
Available grade
Achieved
Entry information
Recommended skills
and knowledge
Unit 669, Demonstrate knowledge of grinding for saw
doctoring, timber machining and finger jointing; and Unit 685,
Grind and hone straight cutters in-head; or demonstrate
equivalent knowledge and skills.
Explanatory notes
1
The following apply to the performance of all outcomes of this unit standard:
a All work practices must meet recognised codes of practice and documented
worksite health and safety and environmental procedures (where these exceed
the code) for personal, product and worksite health and safety, and must meet the
obligations required under current legislation, including the Health and Safety in
Employment Act 1992, the Resource Management Act 1991, and their
subsequent amendments.
b All work practices must meet documented worksite operating procedures. This
includes the recording (by electronic or non-electronic means) of activities,
events, and decisions.
c All evidence of communications gathered in relation to this unit standard must be
in accordance with worksite procedures for content, recipient, timing and method.
2
The reference text for this unit standard is: Timber Machining Grind and Hone Profile
Cutters In-Head, published by Competenz and available from Competenz at
http://www.competenz.org.nz, or Competenz, PO Box 9005, Newmarket, Auckland
1149.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
3
23105 version 2
Page 2 of 6
Definition
Worksite policies and procedures refer to documented policies and to documented or
other directions provided to staff. These include, but are not limited to, ways of
managing health and safety, environmental considerations, quality, and production,
and must conform to legislation. Examples include standard operating procedures,
company health and safety plans, on-site briefings, and supervisor’s instructions.
Outcomes and evidence requirements
Outcome 1
Determine developed profile shape.
Evidence requirements
1.1
Profile type, dimensions, and tooling information are determined in accordance
with customer and worksite requirements.
Range
measurements, angles, radii, minimum cutting circle, cutter face
spacing, cutting angle.
1.2
Profiles are drawn to true shape and actual size in accordance with worksite
policies and procedures.
1.3
Profiles are developed to determine final cutter shape in accordance with
worksite policies and procedures, where required.
Range
minimum cutting circle, cutter face spacing, cutting angle, drawing
accuracy, placement of intersection points, use of drawing
equipment.
Outcome 2
Manage hazards associated with grinding and honing profile cutters in-head.
Evidence requirements
2.1
Hazards associated with grinding and honing profile cutters in-head are
identified and actions to be taken to isolate, minimise or eliminate the hazards
are described in accordance with worksite policies and procedures.
Range
2.2
grinding wheel disintegration, loose grinding wheel, exposure to
grinding coolant.
Safe work practices associated with grinding and honing profile cutters in-head
are identified and used in accordance with worksite policies and procedures and
legislative requirements.
Range
Competenz
SSB Code 101571
practices may include but are not limited to – isolation procedures,
lock-outs, emergency stops, machine guarding, the wearing of
appropriate safety equipment.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
23105 version 2
Page 3 of 6
Outcome 3
Clean cutterhead.
Evidence requirements
3.1
Cutterhead is cleaned of all foreign matter that could affect grinding in
accordance with worksite policies and procedures. The effects of uncleaned
cutterheads on the grinding operation are explained in accordance with the
reference text.
Range
3.2
Cutters and cutterhead are checked for faults, and remedial action is identified,
in accordance with worksite policies and procedures.
Range
3.3
evidence of three effects is required.
faults – cracks, chips, burns, delamination, raised spots;
remedial action – grind or replace.
Cutters are checked for position in or on cutterhead and are adjusted to
manufacturer's specifications. The effect of insufficient cutter projection during
grinding is explained in accordance with the reference text.
Range
insertion, projection.
Outcome 4
Prepare grinder.
Evidence requirements
4.1
Grinder and work area are cleaned of all foreign matter that could affect
grinding in accordance with worksite policies and procedures.
4.2
Grinding wheel and grinder speed are selected to suit cutter steel and grinder
capacity in accordance with worksite policies and procedures. The selection of
grinding wheel and grinder speed is explained in accordance with the reference
text.
4.3
Grinding wheel is checked for faults, and action is taken, in accordance with
worksite policies and procedures. Required action for grinding wheel faults is
described in accordance with the reference text.
Range
4.4
faults – cracks, clogging;
action – replacement, dressing or shaping.
Grinding wheel is trued, shaped and dressed in accordance with worksite
policies and procedures, where applicable. The effects of poor shaping,
dressing and grinder set up practices are explained in accordance with the
reference text.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
4.5
23105 version 2
Page 4 of 6
Grinding wheel is fitted, and grinder operation is checked, in accordance with
manufacturer's specifications.
Range
true running, vibration.
4.6
Grinding angle is set in accordance with worksite policies and procedures. The
effects of using extreme grinding angles on planer operations is explained in
accordance with the reference text.
4.7
Automatic feed is set to manufacturer's specifications, where applicable.
Range
4.8
in-feed, cross-feed, clearance.
Size and shape of stylus is checked for suitability to profile in accordance with
worksite policies and procedures.
Outcome 5
Mount and adjust cutterhead and template.
Evidence requirements
5.1
Cutterhead is locked to the arbor according to manufacturer's specifications.
The consequence of failure to lock the cutterhead to the arbor is explained in
accordance with the reference text.
5.2
Dividing head and tool rest position are explained and set in accordance with
manufacturer's specifications.
5.3
Template is mounted and is adjusted to cutters according to manufacturer's
specifications.
Range
axial and radial adjustments.
5.4
Clearance between grinding wheel and cutters is adjusted to manufacturer's
specifications.
5.5
Coolant level is checked and topped-up in accordance with manufacturer’s
specifications.
Range
wet grinding.
Outcome 6
Grind and hone cutters.
Evidence requirements
6.1
Operation of grinder is checked after the first pass in accordance with worksite
policies and procedures.
6.2
Coolant flow rate and cleanliness are maintained during wet grinding.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
23105 version 2
Page 5 of 6
6.3
Cutters are ground until the specified edge and clearance angles are obtained
across all cutters in accordance with worksite policies and procedures. Cutter
edge defects that can be remedied by grinding are explained in accordance with
the reference text.
6.4
Cutter edges are ground to conform to template in accordance with worksite
policies and procedures.
6.5
Cutter edges are sharpened to specified angle in accordance with worksite
policies and procedures and are free from defects and concentric.
Range
burning, chipping, grinding marks.
6.6
Cutters are honed and the burr is completely removed in accordance with
worksite policies and procedures.
6.7
Grinder is cleaned according to worksite policies and procedures.
Outcome 7
Store cutterhead.
Evidence requirements
7.1
Cutterhead is drained in accordance with worksite policies and procedures, if
applicable.
7.2
Cutterhead is drained and stored according to worksite policies and procedures
for safety and avoidance of moisture and dust.
7.3
Records are completed in accordance with worksite policies and procedures.
Replacement information
This unit standard replaced unit standard 687 and unit
standard 16242.
Planned review date
31 December 2015
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
18 December 2006
31 December 2012
Review
2
15 April 2011
N/A
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
23105 version 2
Page 6 of 6
Consent and Moderation Requirements (CMR) reference
0173
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMRs). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Comments on this unit standard
Please contact the Competenz at info@competenz.org.nz if you wish to suggest changes
to the content of this unit standard.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016